OS ENGINE GT55 Manual
Contents
1. 72403051 72403050 E NON BUBBLE WEIGHT E BLIND NUT 10pcs S M5 71531010 79870050 E LOCK WASHER 10sets M5 55500004 The specifications are subject to alteration for improvement without notice 32 S amane THREE VIEW DRAWING Te Specifications x M Displacement 54 93 cc 3 352 cu in Si S LE i Bore 41 2 mm 1 62 in E a E E Stroke 41 2 mm 1 62 in 75 S D Wi PracticalR P M 1 500 8 000 r p m Ni AX asd B Output 5 5 ps 7 000r p m B Weight 1580 g 55 7 oz Engine 140 g 4 94 oz Ignition Module 40 75 20 T 20 40 35 fl 2 M5 2 EEE LI y 4 3 jea d BD Ni GT 29 n q 1 amp 4m s E X 37 5 112 5 39 39 150 B 78 Dimensions mm 33 34 TY PRECISION quM E Pe SS Re NG Te STINS 6 15 3 Chome Imagawa Higashisumiyoshi ku GS ENGINES MF6 COC LTD Osaka 546 0003 Japan TEL 06 6702 0225 URL http www os engines co jp FAX 06 6704 2722 Copyright 2009 by O S Engines Mfg Co Ltd All rights reserved Printed in Japan 60092290 0210022. 26 27 ENGINE EXPLODED VIEW 28 ENGINE PARTS LIST 7 29 CARBURETOR EXPLODED VIEW 30 CARBURETOR PARTS LIST 31 O S GENUINE PARTS amp ACCESSORIES 32 ENGINE THREE VIEW DRAWINGS 33 MEMO SA etts ie he 34 SAFETY INSTRUCTIONS AND N WARNINGS WARNINGS ABOUT YOUR O S ENGINE Remember that your engine is not a toy but a highly efficient internal combustion machine whose power is capable of harming you or others if it is misused or abused As owner you alone are responsible for the safe operation of your engine so act with discretion and care at all times If at some future date your O S engine is acquired by another person we would respectfully request that these instructions are also passed on to its new owner Never touch or allow any object to come into contact with the rotating propeller and do not crouch over the engine when it is running Gasoline is poisonous Do not allow it come into contact with the eyes or mouth Always store it in a clearly marked container in a cool and dark place and out of the reach of children There is a possibility that it may damage your E The advice which follows is grouped under two health headings according to the degree of damage or danger which might arise through misuse or neglect Gasoline is highly flammable Keep it awa
3. Be sure to use an effective silencer muffler Frequent exposure to an open exhaust may eventually impair your hearing Such noise is also likely to cause annoyance to others over a wide area e Never operate your engine in an enclosed space Model engines like automobile engines exhaust deadly carbon monoxide Run your engine only in an open area Mount the engine in your model securely following e i Do not operate the engine nor model alone or there the manufacturers recommendations is a possibility of injury For their safety keep all onlookers especially small children well back at least 10 meters when preparing your model for flight e When checking a spark plug with the power source on do not hold the plug plug cap high tension cord nor grounding wire or you will get a shock e Install a top quality propeller of the diameter and pitch specified for the engine and aircraft e Do not use a nylon propeller It has the possibility of flying apart due to strong centrifugal force caused by high rpm e Discard any propeller which has become split cracked nicked or otherwise rendered unsafe Never attempt to repair such a propeller destroy it Do not modify a propeller in any way e Install the propeller on the shaft so that the curved face of the blades faces forward i e in the direction of flight Firmly tighten the propeller washer and propeller installing screws using the correct size wre
4. RPM Sensor Cover Plate S creme AN AN Be sure to use an effective silencer muffler Frequent exposure to an open exhaust may eventually impair your hearing Such noise is also likely to cause annoyance to others over a wide SILENCER INSTALLATION Use 5mm steel hex socket head bolts to install the engine Do not use brass soft steel nor aluminum screws because they are not strong enough Also use the Nord Lock Washers optional extra and area other anti loosening washers or apply locking agent i n races i come with S ee coe an Be sure that there is sufficient air intake and outlet area on an IR E M oat Bd era y IS e ao the model for engine cooling to avoid overheating oun fie ST patern ISMS satu MOSTOMErmares o Pay careful attention to the cooling since a gasoline e similar engine size engine generates more heat than a glow engine Secure at least a 30mm dia area around the air intake of Mount the engine in your model securely the velocity stack so that the air intake will not be following the manufacturers recommendations restricted Cut out the cowling big enough if necessary Use a strong enough material for the mounting face of the model such as birch ply firewall of more than 8mm thick Make sure the mounting face of the model is flat If it is u
5. S mais Two stroke gasoline engine for airplanes GT55 It is of vital importance before attempting to operate your engine to read the general SAFETY INSTRUCTIONS AND WARNINGS section on pages 2 5 of this booklet and to strictly adhere to the advice contained therein e Also please study the entire contents of this instruction manual so as to familiarize yourself with the controls and other features of the engine e Keep these instructions in a safe place so that you may readily refer to them whenever necessary e It is suggested that any instructions supplied with the aircraft radio control equipment etc are accessible for checking at the same time OS aam SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE 2 5 ABOUT THE ENGINE 6 ENGINE PARTS NAME 7 SILENCER INSTALLATION 8 FUEL TANK amp LINES 9 CARBURETOR WLA 2 PARTS NAME 10 CARBURETOR LINKAGE 11 12 IGNITION MODULE 13 14 PROPELLER 32 0 3 eese 15 16 MIXING OF OlL 17 M SSS N SSSSN WAY al ON YAAN d NA WY SONS SOY Te CONTENTS RUNNING IN STARTING 18 23 NEEDLE ADJUSTMENTS 24 25 FLIGHT amp MAINTENANCE
6. measure rpm with a tachometer and write it down Be sure to adjust the slow needle only after stopping the engine Repeat step 4 to locate the slow speed needle position where maximum rpm is achieved Open it approx 30 degrees from this position This is the basic slow needle position Open the throttle valve fully and measure rpm with a tachometer and write it down Close the high needle approx 30 degrees and measure rpm and write it down Be sure to adjust the high needle only after stopping the engine Repeat step 7 to locate the high needle position where maximum rpm is achieved Open it approx 30 degrees from this position This is the basic high needle position Set the throttle trim on the transmitter so that the idle rpm is approx 2 000 approx 1 600rpm when idle down function is used 10 Warm the engine for 10 seconds with the throttle fully open then idle the engine for 5 seconds then quickly open the throttle fully Make sure the engine does not respond sluggishly to increase rpm nor hesitates before picking up speed or even ceases firing 11 If the engine responds sluggishly to increase rpm the mixture is too rich due to the slow speed needle being open too far Close the slow speed needle approx 15 degrees Repeat this procedure until the engine accelerates smoothly Be sure to adjust the slow speed needle only after stopping the engine 12 If the engine hesitates before p
7. and approved the following oil mixture ratio KLOTZ ModelLube8 50 1 COSMO Cosmo Terra 2 cycle 50 1 RED LINE Two Stroke Racing Oil 40 1 This does not mean we guarantee the quality of these oils Follow the instructions in the running in section concerning the mixture for running in With a gasoline engine passages in the carburetor are narrower than that of a glow engine and therefore very sensitive against foreign matter such as dust It is suggested to use optional accessory Super Filter L Code No 72403050 when filling a tank in the model from a container used for transportation or storing OS meme RUNNING IN STARTING Always check the throttle linkage Use a fuel with increased oil content and set the needle a If it is disconnected the engine becomes little on the rich side Too rich a needle setting may cause AN uncontrollable which may result in a serious misfiring or erratic running due to fouling of the plug accident Use a 25 1 fuel oil mixture if the particular brand of oil Take care that loose clothing ties shirt sleeves states 30 1 If the oil states 50 1 use a 30 1 mix Set the scarves etc do not come into contact with the high speed needle 100 200 below maximum rpm The low N propeller Do not carry loose objects such as speed needle need not be richened pencils screwdrivers etc in a shirt pocket from where they could fall through the propeller arc No need to carry out running in on
8. engine exhaust heat and radiation heat do not affect it s operation Do not share the power source with receiver and use a separate power source Equip an ON OFF switch between the ignition module and its power source and install it in a place where can be operated from outside the model Install the ignition module and its power source as far as possible away from the servos and receiver power source Connect the ignition module grounding wire to the engine Make sure high the tension cord and grounding wire do not touch the engine and cowl Install he plug cap on the plug securely S ams Bi Precautions Do not disassemble the ignition module and plug cap The ignition module is irreparable Replace it when necessary Be careful not to mount the ignition module so that it can be hit by water gasoline or exhaust Avoid using the engine when the external temperature is over 40 C Do not move the rpm sensor as it is placed at it s optimum position otherwise the engine will not run properly Do not pull on the high tension cord to remove the plug cap or the wire will break Be sure to hold the plug cap to remove it Do not connect nor disconnect the rpm sensor with the ignition module on or there is a possibility it will fire and the engine start 14 OS meme Never touch or allow any object to come into contact with the rotating propeller and do not crouch over the
9. for this engine The wearing of safety glasses is also strongly recommended If you try hand starting be sure to use a chicken stick or heavy glove Never attempt to start the engine with a bare hand Be sure to carry out adjustments of the high speed needle and slow speed needle after stopping the engine Do not start your engine in an area containing loose gravel or sand The propeller may throw such material in your face and eyes and cause injury OS creme ABOUT THE ENGINE B This engine is designed for experienced fliers STANDARD ACCESSORIES 3 Beginners and newcomers should not use this engine Spark Plug CM 6 B The engine unit carburetor and igniter are specially designed B It offers broad power characteristics suitable for Exhaust Gasket GT55 Q sport flight as well as acro flight Q BH The large and dense cooling fins ensure sufficient cooling against overheating Ignition module Assembly IG 01 E The specially designed ignition module IG 01 is equipped with a micro computer and designed not to operate at low rpm and run intermittently when the battery voltage drops It provide high voltage for sure firing through the operating range while utilizing a low current draw A 6 OS amane ENGINE PARTS NAME Spark Plug Cylinder Head D Carburetor Complete WLA 2 Propeller Retaining Screws Propeller Washer High Tension Cord Ground Wire Pilot Shaft Drive Spacer
10. with a glow engine and will stop without warning hesitation and stops with overheating It is recommended that the engine be run with a slightly richer mixture S mam Bl Checking prior to flight When the engine is started make sure the radio control system works normally distance test Engine does not run erratic with full throttle Idling is stable Responds positively to the throttle operation e Warm up is finished Warm up is required as with full size aircraft and car engines Take off the model after warming the engine for approx 10 seconds with full throttle ll Precautions in flight A slight engine rpm increase and decrease delay is normal Abrupt throttle operation will the cause engine to quit Move throttle smoothly Due to the construction of the carburetor 70 8096 of maximum power develops with half throttle If you feel uneasy with this adjust with transmitter function exponential and throttle curve etc or differential of throttle linkage 26 OS asm If these precautions are neglected restrictions of fuel flow may cause the engine to cut out or the fuel air mixture to become too lean causing the engine to overheat With a gasoline engine rust hardly occurs Check the exterior to make sure there is nothing wrong and wipe off any oil res Fill the carburetor with fuel at the conclusion of a day s flying Pay careful attention to fire and ignition source when c
11. a bench nor with the model fixed Just fly the model with the above mentioned Use an electric starter for this engine fuel and needle setting The wearing of safety glasses is also strongly recommended A total of 10 flights 5 6 litters fuel are required AN If you try hand starting be sure to use a chicken Avoid prolonged full throttle running at initial stage and stick or heavy glove Never attempt to start the gradually extend the full throttle running time engine with bare hand WARNING Be sure to carry out adjustments of the high When ground running the engine avoid dusty or sandy AN speed needle and slow speed needle after locations If dust or grit is drawn into the engine this can stopping the engine have a ruinous effect drastically shortening engine life in a matter of minutes Do not start your engine in an area containing loose gravel or sand The propeller may throw such material in your face and eyes and cause injury 18 S creme Since the carburetor points downward when the engine is Bi Starting by an electric starter installed inverted it becomes more difficult for the fuel to reach the carburetor on priming choking Therefore a heavier priming will be required e First starting of the day 1 Make sure the ignition switch is off 2 Close the choke valve fully Wi Initial needle position 3 Set the throttle stick on the transmitter at bottom or 1 8 When starting the engine for the first time se
12. arrying and storing the model If the engine is stored without filling the carburetor with fuel the inside parts will dry out and not work properly at the next running If the engine quits out of fuel refill the carburetor with fuel When the engine is not to be used for a long period more than a year remove the engine from the model clean the outside then remove the carburetor and plug all tubing Clean inside the engine by rotating the crankshaft with the engine immersed in container filled with gasoline FLIGHT amp MAINTENANCE Bil Maintenance after the day s flights Please pay attention to the matter described below to ensure that your engine serves you well in regard to performance reliability and long life 27 Check the tightening of each screw especially engine installing screws and silencer installing screws each time Also for the first several flights tighten the screws after each flight As previously mentioned it is vitally important to avoid operating the engine in conditions where dust distributed by the propeller may be deposited on the engine and enter its working parts Remember to keep your fuel container closed to prevent foreign matter from contaminating the fuel Install a fuel filter to prevent foreign matter in the fuel container from entering the fuel tank O S Super Filter L is available as an optional extra Install an in line fuel filter between the tank and carburetor t
13. dle ldle 24 2 29781210 Spring Metering 29781420 Spring Needle ADJ 24 3 29781220 Valve Inlet Needle 29781360 Choke Arm Assy 24 4 29781230 Pin Metering Lever 9 1 29781350 N4 40x5 Retaining Screw 24 5 29781240 Lever Metering 10 29781310 Shaft Choke 24 6 29781250 Screw Metering 11 29781320 Valve Choke 25 29781120 Gasket Metering Diaphragm 12 29781570 4 40x4 Retaining Screw 26 29781130 Diaphragm Assembly Metering 13 29781550 Lever Outer 27 29781140 Cover Assembly Metering W Nipple 14 29781510 Shaft Throttle 28 29781070 Carb Assemble Screw 15 129781560 Ring Retaining The specifications are subject to alteration for improvement without notice 16 29781520 Valve Throttle 17 29781530 Spring Throttle Return 18 29781540 Link Throttle 19 29781370 Throttle Arm Assy 19 1 29781350 N4 40x5 Retaining Screw 31 OS creme E SUPER FILTER S E SUPER FILTER L O S GENUINE PARTS amp ACCESSORIES
14. e Carry out the needle adjustments only after stopping the engine Do not allow your face or hands to come close to the rotating prop Type Size DxP Running in 22x8 22x10 23x8 23x10 Sport Acro Scale 24x8 24x10 Warning Make sure that the propeller is well balanced An unbalanced propeller and or spinner can cause serious vibration which may weaken parts of the airframe or affect the safety of the radio control system Do not use any propeller which has become split cracked or nicked even very slightly or received strong impact even if no apparent damage is visible OS aem E INSTLLATION OF PROPELLER Install the propeller on the shaft so that the curved face of the blades faces forward i e in the direction of flight Firmly tighten the propeller N washer and propeller retaining screws using the correct size wrench Always check the tightness of propeller retaining screws and retighten them if necessary before restarting the engine If the supplied retaining screws are too long due to a thinner prop hub or too short due to a thicker prop hub cannot be screwed into the drive hub by more than 10mm Use suitable length strong steel hex socket head cap screws Install the propeller before the first flight of the day and remove it after the day s flight Make a habit of always checking the tightness of propeller retaining screws making sure they are free of damage or rust before s
15. e day 1 2 Make sure the ignition switch is off Close the choke valve fully Fully advance the throttle stick on the transmitter 20 OS aas Flip the propeller until the fuel runs out of the carburetor then flip 3 4 times more 6 7 times in winter In case of upright and side installation flip 7 8 more time after the fuel reaches the carburetor Open the choke valve fully With the throttle stick fully open flip 6 7 times to draw the fuel mixture into the cylinder Set the throttle stick on the transmitter at bottom or 1 8 2 3 clicks advanced from the bottom Turn on the ignition switch Tell the helper and onlookers that you will start the engine now and have the helper hold the model securely Usually the engine starts with 1 3 flips If you have only short runs or the engine does not start with more than 10 flips most probably priming is not sufficient Repeat the procedure from the beginning Note If the engine does not start after more than 5 times repeat the procedure over priming is suspected Check whether the plug is wet or not If the plug is wet replace it or wait until it is dried Then flip the propeller swiftly 15 20 times with the plug removed to eject the fuel in the cylinder Then install the plug and repeat the starting procedure Second and later starting of the day Starting with a Chicken stick or gloved hand while the engine is warm 1 Set the throttle stick o
16. engine when it is running Install a top quality propeller of the diameter and pitch specified for the engine and aircraft Do not use a nylon propeller It has the possibility of flying apart due to strong centrifugal force caused by high rpm Discard any propeller which has become split cracked nicked or otherwise rendered unsafe Never attempt to repair such a propeller destroy it Do not modify a propeller in any way gt PPE Check the ignition module for spark when installing the plug cap on the plug and be careful about getting a shock Make sure there is no flammable material or gasoline vapors near by that could ignite Do not turn the propeller with the ignition module on or 15 there is a possibility the engine will start PROPELLER Use a wooden or a carbon fiber propeller Do not use a nylon propeller The choice of propeller depends on the design and weight of the aircraft and on the type of flying in which you will be engaged Determine the best size and type after practical experimentation As s starting point refer to the props listed in the table shown below Slightly larger or even slightly smaller props than those shown in the table may be used but remember that propeller noise will increase if blade tip velocity is raised due to high rpm or if a larger diameter lower pitch prop is used Be well aware propeller rotating arc is very large due to a large propeller used with this engin
17. fuel runs out of the carburetor then flip 3 4 times more 6 7 times in winter In case of upright and side installation flip 7 8 more time after the fuel reached the carburetor Open the choke valve fully Turn on the ignition switch Tell the helper and onlookers that you will start the engine now and have the helper hold the model securely Flip the propeller with a Chicken stick or gloved hand to start the engine Usually the engine will start with 5 6 flips If you have only short runs or the engine does not start with more than 15 flips most probably the priming is not sufficient Repeat the procedure again 22 OS meme e Second and later starting of the day Starting with a Chicken stick or gloved hand while the engine is warm 1 Set the throttle stick at bottom or 1 8 2 3 clicks advanced from the bottom 2 Make sure the choke valve is fully open 3 Turn on the ignition switch 4 Tell the helper and onlookers that you will start the engine now and have the helper hold the model securely 5 Flip the propeller to start the engine Note If the engine does not start after more than 5 times repeat the procedure over priming is suspected Check whether the plug is wet or not If the plug is wet replace it or wait until it is dried Then flip the propeller swiftly 15 20 times with the plug removed to eject the fuel in the cylinder Then install the plug and repeat the starting procedure Starting w
18. icking up speed or ceases firing the mixture is too lean due to the slow speed needle being open too far Open the needle approx 15 degrees Repeat this procedure until the engine accelerates smoothly Be sure to adjust the slow speed needle only after stopping the engine Bl Adjustment with flight 13 If the rpm drops or the exhaust sound weakens when vertically climbing from level flight with full throttle the mixture is too lean Land the model and open the high speed needle approx 15 degrees Repeat this procedure until the engine sound is smooth 25 14 If on the other hand exhaust sound is irregular when vertically climbing from level flight the mixture is too rich Land the model and close the high speed needle approx 15 degrees Repeat this procedure until the sound in level flight is steady 15 If the power drops gradually or exhaust sound weakens overheating symptom when performing torque roll and hovering the mixture is too lean Land the model and open the slow speed needle approx 15 degrees Repeat this procedure until power remains steady 16 If the above symptom is not detected with prolonged torque roll and hovering but sluggish to increased rpm when the throttle is fully opened abruptly the mixture is too rich Land the model and close the slow speed needle approx 15 degrees until sluggish rpm increase disappears Note Generally a gasoline engine is sensitive to a lean mixture compared
19. increase the rpm above mid speed and land the model immediately The ignition module is set not to operate below 100rpm for safety The voltage of power source is 4 8 7 4V rated Ni Cd Ni H 4 6 cells Li Po Li Fe 2 cells 13 Connect the linkage so that the throttle valve is fully opened when the throttle stick on the transmitter is fully advanced Adjust the movement so that the pushrod does not bind when the throttle valve is fully closed and fully opened Connect the linkage so that the servo arm and pushrod and throttle valve lever make a right angle when the throttle stick on the transmitter is placed at mid position to avoid differential action When changing the throttle valve lever and choke valve lever direction loosen and tighten each retaining screw placing each lever at mid position If the throttle valve lever retaining screw is loosened or tightened with the throttle valve fully opened or closed excessive force will be applied which will results in breaking the lever There is no need to connect to the air vent fitting in normal use However if the engine does not run steadily due to pressure change caused by airflow in the cowl connect tubing to the inside of the fuselage IGNITION MODULE Installation Install the ignition module taking sufficient anti vibration measures Install the ignition module at least 100mm away from the engine and in a place where there is airflow so that
20. ith a Chicken stick or gloved hand when the engine is cold 1 Make sure the ignition switch is off 2 Close the choke valve fully 3 Set the throttle stick at bottom or 1 8 2 3 clicks advanced from the bottom 4 Flip the propeller 2 3 times 3 4 times in winter 5 Open the choke valve fully 6 Turn on the ignition switch 7 Tell the helper and onlookers that you will start the engine now and have the helper hold the model securely 8 Flip the propeller to start the engine 23 OS creme The slow speed needle is effective through the high speed range while the high speed needle is not effective in the low speed range Both needles are effective in the mid speed range while the slow speed needle is the most effective Refer to the diagram below More x a High Needle i Fuel Flow A Effective Range ff fb Ep yc es JA 4 Slow Needle Effective Range 74 Ae cif AD E 1 2 Throttle Opening Carry out the needle settings as follows lll Adjustment on the ground 1 Set both needles at two turns open from the fully closed position 24 OS asm NEEDLE ADJUSTMENTS Start the engine Open the throttle valve slowly until fully open and run the engine for 10 seconds to warm the engine Set the throttle stick 3 clicks advanced from the bottom and measure rpm with a tachometer and write it down Close the slow speed needle approx 30 degrees and
21. ition If the throttle valve lever retaining screw is loosened or tightened with the throttle valve fully opened or closed excessive force will be applied which will results in breaking the lever OS asm Before connecting the throttle linkage make sure that the throttle valve lever does not interfere with the bulkhead or mount of the model when it is fully closed and opened Connect the throttle linkage so that clearance gap between the idle stop and idle speed stop lever distance is 1 1 5mm refer to the sketch shown below when the throttle stick on the transmitter is fully pulled down and the throttle valve is fully closed as well as the trim lever on the transmitter Connect linkage so that this gap distance is 1 1 5mm This is the idling position 12 S mam source on do not hold the plug plug cap high tension cord nor grounding wire or you will get a shock When checking the spark plug with the power Be sure to equip an externally operable switch for the ignition system battery to stop the engine if started unexpectedly without switching on the radio system or there is a possibility of injury B Major specifications Consumption current is 600mA 6 000rpm User a power source of more than 1000mA h capacity For safety with this ignition module the engine runs intermittently over 5 000rpm when the power source voltage drops below 3 8V With this intermittent running rpm do not
22. n the transmitter at bottom or 1 8 2 3 clicks advanced from the bottom 2 Make sure the choke valve is fully open 3 Turn on the ignition switch 4 Tell the helper and onlookers that you will start the engine now and have the helper to hold the model securely 5 Flip the propeller with a Chicken stick or gloved hand to start the engine 21 Starting with a Chicken stick or gloved hand when the engine is cold 1 Make sure the ignition switch is off 2 Close the choke valve fully 3 Fully advance the throttle stick on the transmitter 4 Flip a propeller 2 3 times 3 4 times in winter In case of upright and side installation flip 3 4 times 5 Open the choke valve fully Flip the propeller 6 7 times to draw the mixture into the cylinder with the throttle stick fully advanced 6 Set the throttle stick at bottom or 1 8 2 3 clicks advanced from the bottom 7 Turn on the ignition switch 8 Tell the helper and onlookers that you will start the engine now and have the helper to hold the model securely 9 Flip the propeller with a Chicken stick or gloved hand to start the engine OS ams ll Starting with a Chicken stick or gloved hand No 2 It is suggested to use an electric starter Fist starting of the day 1 2 Make sure the ignition switch is off Close the choke valve fully Set the throttle stick at bottom or 1 8 2 3 clicks advanced from the bottom Flip the propeller until the
23. nch Always check the tightness of propeller installing screws and retighten them if necessary before starting the engine Also check the tightness of all the screws and nuts before restarting the engine e If you have to carry the model to the take off point with the engine running be especially cautious Keep the propeller pointed away from you and walk well clear of spectators e Switch off the ignition module to stop the engine or fully close the throttle valve via the transmitter to shut off the fuel supply Otherwise there is a possibility of injury e Immediately after the engine is stopped the engine may start with a crank even when the igniter switch is off Do not crank the engine or there is a possibility of injury e Be sure to install an externally operable switch for the ignition system battery to stop the engine if it is started unintentionally with the radio transmitter turned off or there is the possibility of injury e Connect the throttle linkage so that the engine can be stopped via radio operation Always check the throttle linkage If it is disconnected throttle action becomes uncontrollable which may result in a serious accident Take care that loose clothing ties shirt sleeves scarves etc do not come into contact with the propeller Do not carry loose objects such as pencils screwdrivers etc in a shirt pocket from where they could fall through the propeller arc Use an electric starter
24. neven work on it to be flat When shims are added to change the thrust angle work on it to be flat Engine mounting face has been high precision machined flat Make sure mounting face of the model is also flat 8 Samen FUEL TANK amp LINES Use a tank designed for gasoline Use fuel line keepers at the end of the tubing to prevent at Tanks designed for glow fuel use a rubber cap which is from coming off deteriorated by gasoline This engine does not require a muffler pressurized fuel A 600cc tank will provide 13 14 minutes flight system but be sure to provide an air vent e Install a commercially available gasoline fuel filter between Be sure to install an in line fuel filter between the tank and fuel tank and carburetor Clean the filter from time to time carburetor to prevent foreign matter in the tank from entering the carburetor Clean the filter periodically For plumbing use TYGON F 4040 Yellow color or strong nitrile rubber of more than 3mm ID and 6mm OD Replace tubing periodically as it becomes hardened Replace tubing inside the fuel tank every six months C EE Be sure to equip air vent pipe Be sure to use binding band to prevent from coming off Be sure to replace piping inside periodically To carburetor fuel inlet Piping for re fuelling Be sure to use a gasoline resistant fuel tank cap 9 OS meme Carburetor Body High Speed Needle Spring Throttle Return Air Ven
25. o prevent foreign matter in the tank from entering the carburetor Clean these filters periodically Also use gasoline to clean the outside of the carburetor Do not use kerosene or the inside parts will be damaged Clean the outside only because the inside parts are sensitive to foreign matter After cleaning the engine dry it well then inject a small quantity of oil used to mix fuel and rotate the crankshaft several times to distribute the oil well inside the engine Finally reassemble the engine and store it in a dry place after inserting it in a heavy vinyl bag sodz maios Bulurejoy oeis AiooJeA OSXSIN 09944862 maiog dej M S Jo ed gt sody weiog Bulurejoy jeuseM 1jelledodd SpXSIN GpG 1 864 sody eios Buurejeu ld 46 02 SLXSIN GL GL2967 sodo maios Buturejeg peeH 4epull 2 OZXPW 0212967 euiBue ue ui pesn sog ezis ON 9po53 sies sodo SLIS MAYOS dVO eonou jnouyM jueureA oJduii 10 uoneJeye 0 joefqns eje suoneouioeds eu SG 1e3se5 1sneux3 00 v176c 9 IND nid weds 00069917 jes deo nid 002200v7 L0 51 ainpow uoniub 00020077 eje d 19409 000720260 cc 9 set JOAOD O02vLZ262 Ic yeusxue4 00020262 0c u Buueeg ieg 0001 262 61 Du O OLELOZ62 L 84 Bniq eseoxueJ 00 10Z262 84 eseoyuel 000L10762 ZL 4 Buueeg ieg 0000 262 91 Aay eied 00280Z62 c Sl 19J02 1ede L 00180262 L 94 Jeoeds eA
26. t Fitting No need to connect in normal use 10 OS aam AN Bi Connect the throttle linkage so that the engine can be stopped by radio operation in case of unexpected starting or there is a possibility of injury Connect the throttle linkage so that the engine can be stopped via radio operation Throttle lever can be installed either on right or left Here is a changing procedure 1 Remove the throttle lever retaining screw Pay attention not to lose this screw because it is special size Also be careful not to remove the idle stop screw and return spring If they are removed accidentally assemble them being aware of the small notch 2 Then remove the opposite side high speed stop retaining screw Pay attention not to lose this screw because it is special size At this time be careful not to remove the high speed stop lever 3 Then install the throttle lever with the throttle lever retaining screw 4 Then install the idle speed stop lever with the high speed stop lever retaining screw CARBURETOR WLA 2 PARTS NAME Idle Speed Stop Lever Idle Speed Stop Screw A No need to adjust Factory adjusted N Throttle Valve Lever Retaining Screw High Speed Stop Lever Throttle Valve Lever 11 Choke Valve Lever Fuel Inlet High Speed Stop Lever Retaining Screw CARBURETOR LINKAGE NOTE When loosening and tightening each retaining screw do so with the throttle valve at mid pos
27. t both the 2 3 clicks advanced from the bottom high speed needle and the slow speed needle two turns open from the fully closed position 4 Flip the propeller with a Chicken stick or gloved hand until With this position both high and slow speed mixtures will the fuel runs out of the carburetor In case of upright and be rich side installation flip 7 8 more times after the fuel reaches the carburetor Do not use an electric starter or the engine will be over primed If the settings are upset come back to this setting and adjust them according to procedure in the needle setting section 5 Open the choke valve fully 6 Make sure the throttle stick is at the bottom or 1 8 2 3 advanced from the bottom 7 Turn on the ignition switch 8 Tell the helper and onlookers that you will start the engine now and have the helper hold the model securely 9 Apply the electric starter 19 OS meme Second and later starting of the day 1 Set the throttle stick on the transmitter at bottom or 1 8 2 3 clicks advanced from the bottom Make sure the choke valve is fully opened Turn on the ignition switch Tell the helper and onlookers that you will start the engine now and have the helper hold the model securely Apply the electric starter ll Starting with a Chicken stick or gloved hand No 1 Two different procedures are explained It is suggested to use an electric starter e First starting of th
28. tarting the engine Replace the propeller periodically every 50 flights even if it looks as ifs nothing is wrong 16 OS meme Gasoline is poisonous Do not allow it to come into contact with the eyes or mouth Always store AN it in a clearly marked container in a cool and dark place out of the reach of children There is a possibility that it may damage your health Gasoline is highly flammable Keep it away from an open flame excessive heat sources of sparks or anything else which might ignite it Do not smoke or allow anyone else to smoke near to it Carry out mixing of gasoline and oil in a well ventilated and free of fire outdoor place or there is a possibility of fire Refill the models fuel tank only after the engine has well cooled down or there is a danger of fire Observe the laws and regulations in each country and district concerning the usage transportation and storage of gasoline Ask details at fire station in each district gt epe EB MIXING OF OIL Use regular gasoline No need to use high octane gasoline Alcohol based glow fuel cannot be used in this engine Not only will the engine not work properly but the internal carburetor plastic parts will be damaged Use high quality commercially available 2 stroke engine oil Follow the oil manufacturers recommendations concerning the mixture ratio of gasoline and oil If there is no recommendation mix with a 30 1 ratio We have checked
29. ug 00080262 SI Heys 1old 00120262 vl Jaysen 1JejjedoJd 00060262 L jes weJog Bulureyoy Josuag UOHeIOY OLZLOZ6Z L Z Josues uoneioH 00ZL0Z62 cl Jes 1exseo JOJINGIED 00S81876c LL Jeyejnsu 40jeungJe2 OLLLSZ6Z OL Z V 1M 91e dui02 10j9Jnqje 00018267 xoels AyoojeA 00618762 cS 28 6 8 poy Bun euuo 000G0Z6c 4 JOUIE OY Uld uoisid 00071262 9 S y 4 0SXSW O N uld UOlSId 00090262 uo Sid 00c 0Z76c Buy uojsid 00v 076c 19u17 Jepui 2 OOLEOL6Z ayse peeH 00Lv1Z62 L 4 peeH JepuiA 00070762 uonduosog ON 9po9 ON 1S S1HVd 3NION3 ERE S o M3lA q3ao 1aX3 3NISN3 bd G 29 OS cneme CARBURETOR EXPLODED VIEW N4 40x5 P 11 i 10 Type of screw _N Round Head Screw 30 Samome CARBURETOR PARTS LIST No Code No Description No Code No Description 1 29781340 Spring Choke Friction 20 29781020 Gasket Passage 2 29781330 Ball 21 29781030 Plate Passage 3 29781460 Plug Friction 22 29781040 Gasket Pump 4 29781450 Screw Idle Speed 23 29781050 Diaphragm Pump 5 29781430 Needle High Speed 24 29781270 Body Assembly Pump 6 7 8 9 29781440 Spring Needle H ADJ 24 1 29781060 Screen Inlet 29781410 Nee
30. y from an open flame excessive heat AN WARN NGS sources of sparks or anything else which might cause it to ignite Do not smoke or allow anyone else to smoke near to it These cover events which might involve serious in extreme circumstances even fatal injury Carry out the mixing of the gasoline and oil outdoors or in a well ventilated place away from any source of fire to prevent the possibility of a fire e Refill the fuel tank only after the engine is These cover the many other possibilities generally less well cooled down or there is a danger of obvious sources of danger but which under certain fire circumstances may also cause damage or injury N WARNINGS e Observe the laws and regulations in each country Any propeller requires utmost attention to handle and district concerning the usage transportation Be sure to follow the instruction manual supplied and storage of gasoline Ask details at fire station in with a propeller each district This engine was designed for model aircraft e Model engines generates considerable Do not attempt to use it for any other purpose heat Do not touch any part of your engine until it has cooled Contact with Start the engine only after installing it in the model the muffler silencer cylinder head or A Do not start the engine before installing it in the exhaust header pipe in particular may model or there is a possibility of injury results in a serious burn
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